code: def convert_to_array_data(self):
      self.preprocessed_case, affine = read_image_files(
          self.preprocessed_case, return_affine=True
      )
  
      if affine is not None:
          self.preprocessed_affine = affine
  
file_path: DeepNeuro/deepneuro/data/data_group.py
imports: import numpy
  from deepneuro.utilities.conversion import read_image_files
label_desc: Use image node_id 5 for calling the DataGroup obj's underlying member method code with example usage: obj.convert_to_array_data() without return types